Re: Anybody add gypsum to their soil for calcium?
Edwmax,
I remember reading somewhere that bone meal usually takes around a month but that would all depend on the microbiology and how quick they did their job.
I also remember reading about someone crushing eggshells and placing them in a container with water and letting that do its thing for some time and supposedly that would work immediately.
I am not arguing just mentioning about these and hope you or anyone else can add to it
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